熔炼-球磨二步法制备Fe-Mn-Si三元合金  

Preparing Fe-Mn-Si ternary alloy by melting-ball-milling two-step method

作　　者：谢锐[1] 黄峰[1] 方茜[1] 詹晖[2] 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]武汉大学化学与分子科学学院,湖北武汉430074

出　　处：《电池》2011年第3期135-137,共3页Battery Bimonthly

摘　　要：用熔炼-球磨二步法制备了Fe-Mn-Si三元合金粉末。对试样进行了XRD、SEM分析和电化学性能测试。试样中存在两相和三相化合物,颗粒尺寸随着Si含量[w（Si）]的增加而增大。随着w（Si）的增加,试样的首次充放电比容量上升,但首次不可逆容量损失增加。以30 mA/g的电流在0.01-1.50 V循环,w（Si）为65%、50%、40%的试样的充电比容量分别为213.9 mAh/g、51.9 mAh/g和45.3 mAh/g,不可逆容量损失分别为67.5%、59.9%和50.8%。Fe-Mn-Si ternary alloy powders were prepared by melting-ball-milling two-step method.XRD,SEM analyses and electrochemical performance test were taken to the samples.Two-phase compounds and three-phase compounds existed in the samples,particle size of the samples increased with the increasing of Si content [w（Si）].The initial specific charge-discharge capacity of the sample rose with the increasing of w（Si）,but the initial irreversible capacity lose increased.When cycled in 0.01～1.50 V with the current of 30 mA/g,the specific charge capacity of the samples with w（Si） of 65%,50% and 40% was 213.9 mAh/g,51.9 mAh/g and 45.3 mAh/g,respectively,the irreversible capacity loss was 67.5%,59.9% and 50.8%,respectively.

关 键 词：负极材料 熔炼 球磨 Fe-Mn-Si三元合金 

分 类 号：TM912.9[电气工程—电力电子与电力传动]